[Moims-dai] FW: CDO text

Thu Apr 4 07:34:39 UTC 2019

Hi,

I favor dropping that sentence.

One of my objections is that it is that I  would prefer that we would define things by their information model not by how  the particular object is used.   I would prefer to be able to call every combination of a Content Data Object and Representation  Information Content Information (even if that object wasn’t a target of preservation).

Additionally to address the other issue from the last telecon, we should probably address the new wording for the Producer definition.

“Producer: The role played by those persons or client systems that provide the information to be preserved. This can include internal or external OAIS persons or systems.”

If people are now understanding that this indicates that the Producer can be inside an OAIS, then that contradicts all the diagrams we have that show the Producer as external to the OAIS.

To start with see Section 2.1 which starts with our simplest environment diagram and that includes the text,

“Outside the OAIS are Producers, Consumers, and Management.”

We have consistently said that anytime anything internal to an OAIS that takes on the role of Producer, then while it is executing that role, it is considered external to the OAIS.  That means it has to have Submissions Agreements, etc. and the data that it submits has to undergo checks. 

Peace and joy,

-JOhn

From: MOIMS-DAI <moims-dai-bounces at mailman.ccsds.org> On Behalf Of Robert Downs
Sent: Tuesday, April 2, 2019 4:19 PM
To: MOIMS-Data Archive Interoperability <moims-dai at mailman.ccsds.org>
Subject: Re: [Moims-dai] FW: CDO text

Please let me add my voice of agreement to Don's point and Mark's agreement that Content Information should be defined as "the original target of preservation".

Thanks,

Bob

Robert R. Downs, PhD
Senior Digital Archivist and Senior Staff Associate Officer of Research
Acting Head of Cyberinfrastructure and Informatics Research and Development
Center for International Earth Science Information Network (CIESIN),
The Earth Institute, Columbia University
P.O. Box 1000, 61 Route 9W, Palisades, NY 10964 USA
Voice: 845-365-8985; fax: 845-365-8922
E-mail: rdowns at ciesin.columbia.edu <mailto:rdowns at ciesin.columbia.edu> 
Columbia University CIESIN Web site: http://www.ciesin.columbia.edu
ORCID: 0000-0002-8595-5134

On Tue, Apr 2, 2019 at 3:30 PM Mark Conrad <mark.conrad at nara.gov <mailto:mark.conrad at nara.gov> > wrote:

Well said, Don. I have become the lone voice at our weekly meetings defending Content Information as the information originally provided by the Producer. 

Mark Conrad
NARA Information Services

Systems Engineering Division (IT)
The National Archives and Records Administration
Erma Ora Byrd Conference and Learning Center
Building 494, Room 225
610 State Route 956
Rocket Center, WV  26726

Phone: 304-726-7820
Fax: 304-726-7802
Email: mark.conrad at nara.gov <mailto:mark.conrad at nara.gov>  

On Tue, Apr 2, 2019 at 2:47 PM D or C Sawyer <Sawyer at acm.org <mailto:Sawyer at acm.org> > wrote:

Hi David,

There is no valid reason to change the Content Information definition from ‘the original target of preservation’ to ‘a target of preservation’.  This has been there from the beginning to make clear it is referring to the original information provided by the Producer and not just any information within the Archive.  This is important to ensure that when people are discussing preservation within an OAIS context, everyone understands this is the information originally provided by the Producer.  

Of course we understand why you want to make this change because you still want to move Content Information to being ANY information in the Archive so you can claim the whole process is recursive by definition ‘and been there from the beginning'.  This would be a radical, ambiguity enhancing,  change to the long standing common understanding of the OAIS information and functional modeling.  For these reasons this proposed change should be thoroughly rejected by the group.

Cheers-

Don

On Apr 2, 2019, at 10:06 AM, David Giaretta <david at giaretta.org <mailto:david at giaretta.org> > wrote:

From: David Giaretta < <mailto:david at giaretta.org> david at giaretta.org> 
Sent: 02 April 2019 13:12
To: 'Mark Conrad' < <mailto:mark.conrad at nara.gov> mark.conrad at nara.gov>; 'John Garrett' < <mailto:garrett at his.com> garrett at his.com>
Subject: CDO text

My suggestions for the additional text:

Change in current draft from:

Preservation Description Information (PDI): The information, which along with Representation Information, is necessary for adequate preservation of the Content Data Object and which can be categorized as Provenance Information, Context Information, Reference Information, Fixity Information, and Access Rights Information.

Note: Defining PDI (as well as its components - Provenance Information, Context Information, Reference Information, Fixity Information, and Access Rights Information) as relevant to the Content Data Object does not mean that those concerns are any less important for other data objects or at other levels, for example, it is important to apply reference, fixity, provenance, context and access rights to Representation Information, or to any other information the Archive is preserving. Definition of these terms as relevant to the Content Data Object is simply to ease discussion of these concepts at the Content Data Object level.

To:

Preservation Description Information (PDI): The information, which along with Representation Information, is necessary for adequate preservation of the Content Data Object and which can be categorized as Provenance Information, Context Information, Reference Information, Fixity Information, and Access Rights Information.

Note: Defining PDI (as well as its components - Provenance Information, Context Information, Reference Information, Fixity Information, and Access Rights Information) as relevant to the Content Data Object does not mean that those concerns are any less important for other data objects or at other levels, for example, it is important to apply reference, fixity, provenance, context and access rights to Representation Information, or to any other information the Archive is preserving. Definition of these terms as relevant to the Content Data Object is simply to ease discussion of these concepts at the Content Data Object level.

I suggest deleting the last sentence because it does not make sense to me.

Change

Content Information: A set of information that is the original target of preservation. It is an Information Object composed of its Content Data Object and its Representation Information.

To

Content Information: A set of information that is a the original target of preservation. It is an Information Object composed of its Content Data Object and its Representation Information.

There are a few other places the change “the original” to “a” would also be needed.

Add to the end of section 4.2.1.4 Taxonomy of Information Object Classes Used by OAIS

Content Information is any Information Object which is being preserved by the Archive. 

I don’t know an easy way to put this into the UML diagram.

Also add the end of section 4.2.1.4.1 Content Information: 

Any Information Object being preserved by the Archive, such as Representation Information, PDI etc., may also be considered to be Content Information.

..David

_______________________________________________
MOIMS-DAI mailing list
 <mailto:MOIMS-DAI at mailman.ccsds.org> MOIMS-DAI at mailman.ccsds.org
 <https://mailman.ccsds.org/cgi-bin/mailman/listinfo/moims-dai> https://mailman.ccsds.org/cgi-bin/mailman/listinfo/moims-dai

_______________________________________________
MOIMS-DAI mailing list
MOIMS-DAI at mailman.ccsds.org <mailto:MOIMS-DAI at mailman.ccsds.org> 
https://mailman.ccsds.org/cgi-bin/mailman/listinfo/moims-dai

_______________________________________________
MOIMS-DAI mailing list
MOIMS-DAI at mailman.ccsds.org <mailto:MOIMS-DAI at mailman.ccsds.org> 
https://mailman.ccsds.org/cgi-bin/mailman/listinfo/moims-dai

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.ccsds.org/pipermail/moims-dai/attachments/20190404/d965b205/attachment-0001.html>